Fourdrinier machine.



C. ,E. POPE. FOURDRINIER MACHINE.

APPLICATION .FILED MAY 29, I915.

Patented Mar. 7, 1916.

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cHARLEs ELMER POPE, F HOLY OKE,'- MASSACHUSETTS.

To all whom it may concern: Be it known that-I, CHARLES E. Porn, a citizen of the United States, residing at Holyoke, in the county of Hampden and -State of Massachusetts, have invented an Improvement in Fourdrinier Machines, of

, which the following is a specification.

My invention relates to paper-making, being particularly applicable to papermaking upon Fourdrinier machines run at high speed.

It consists of a new deviceapplicable to the press-roll or drying portion of paperm'aking machines and adapted for taking off the web from an upper press-roll and causing itto follow the felts. This device comprises a narrow endless traveling band, ar-

ranged above the felt, and supported upon end-rollers, which drive the belt at a speed preferably somewhat in excess of the speed of. the felts. This device is arranged for movement intoland out of contact with the upper press-roll from which it is desired -to takeoff the web; it being movable into engagement with said roll at the beginning of the. papremaking operation, or after a break, whereupon the band, which is travcling at therpoint of contactwith the upper press-roll in the opposite direction therefrom, will necessarily remove the web therefrom and redirect it, and cause it to fall by gravity upon the felt, although it. may be assisted more or less by its momentum. The

traveling band, after contact with the pressroll and the removal of the web therefrom is carried substantially parallel with the felt, inthe same direction and preferably at a higher speed than the felt. In this way it acts to assist, in guiding the web.

along with the-felt, and to insure its substantial engagement therewith. The materialof which the band .is made is felt or some similar Imaterial,-to which the web between thefwet web and-the band is at "once broken. In. this way I- have; not only produced an'eifective take-0E dev1ce,-but a guide-which can be carried as faralong w th the wet web asmay be desired,-to assistin J kee ing the web in place on therea. I may carry the-endless band' acrossthe space be.- tween the first and second felt if desired,-

,rouanmivmn Machine.

Patented Mar. '7, 1916.

Application filed May 29, 1915. Serial No. 31,264.

. s and by so domg some advantage 1s secured necessary that the traveling band be so long.

' in the Way of guiding the web,but it is not In practice, I prefer that the endless band i shall not be over two feet wide, as the practice is to carry over only a narrow strip of the web at first, and after such strip is running properly then to increase the width of the web to the full width. Thereupon, I prefer to relax the traveling-band, or otherwise move it out of contact with thepressroll, thus saving wear upon the band and the press roll.

Figure 1 is a conventional view of a portion of a Fourdrinier machine illustrating my invention. Fig. 2 is a plan view of the same. Fig. 3 is an enlarged side elevation of the take-ofi'device and associated parts. Fig. 4 is an enlarged detail of the actuatingmeans for moving the take-01f device into and out of engagement with the press-roll.

l and'2 represent, respectively, the upper and lower press-rolls, and 3 and l, the felts which are associated therewith 'in' any usual or suitable manner, said elements, in so far as here shown, being common in the drying or press-roll portion of a Fourdri'nier machine. My novel take-01f device is here shown as arranged for co-action with one, which may be-any one of the upper P'I'GSS',

rolls, butit is more important in connection with'the first upper press-roll than with the other," as the paper isharder to take off from that roll.

In the construction of my'take-oif device 10 represents a traveling endless belt of some material to which the Web will not strongly adhere, felt being well suited to the e purpose. This endless band is arranged and i a'ble driving-means, or from any suitablesource, and preferably at a speed slightly greater than the speed of the moving felts. The other end-roll 14 has the bearings of its supporting shaft arranged in a movable frame-structure, to admit of" said end-roll being moved bodily. Sald flnd-l'olli-l, 1s disposed, adjacent an upper press-roll, and

its. bodily movement is suflicient toenable I the band paxing over it to'move mto and c out of' 'engagment with said upper pressroll. As a frame-structure for supporting an outstanding arm 22, which has a bearing for the other end of said shaft, so that upon swinging said lever, said end-roll will be moved bodily, and the felt-band passing over it will be moved into andout of engagement with the press-roll.

When starting the machine, or in case of a break in the web, the narrow strip of web which is formed on the wire is carried forward by the press-rolls, and has a tendency to adhere to an upper press-roll. To prevent it from winding thereon the movable end-roll of my take-off is moved'to bring the felt band into engagement with said upper press-roll, and as the band is traveling at the point of contact in a direction opposite to that of the contacting-portion of the press-roll the web is removed from the press-roll and caused to fall by gravity upon the felt below, being assisted more or less by its momentum. Said narrow strip is then carried along by the felt and is held in place thereon by the lower horizontal portion of the traveling-band which is at such time arranged in parallel relation therewith, butowhich is preferably moving at a,

slightly greater speed. As soon as the narrow strip is found to be running properly, the web is gradually increased to its full width on the wire, and then the movable end-roll of the take-off device may be retnrned to its normal position, carrying the felt-band out of engagement with the pressroll. Such movement of the end-roll slackens the traveling-band somewhat, but not suflicient to be harmful. There may be one or more take-off devices of this description associated with the machine as may be dem'red, and theyma-y be associated withany of thepress-rolls. I prefer to arrange my take-0E device so that it shall extend over the adjacent ends of two felts, thus crossing the space between them, as represented in Fig. 1.

I claim t 1. In a Fourdrinier machine having in combination with the press-rolls and felts, a take-ofl device comprising a traveling band, end-rolls supporting said band, one of said end-rolls being bodily movable; and means to move said movable end-roll bodily to carry the band into and out of engagement with one of the press-rolls, the portion of said band which contacts with said press-roll having a movement in a direction opposite to th t portion of the press-roll which it engages.

2. In a Fourdrinier machine havi in combination with the press-rolls and felts, a take-off device comprising a travelingbandv arranged in substantially parallel resaid band, one of said end-rolls being bodily movable, and means to move said movable end-roll bodily to carry the band into and out of engagement with one of the pressrolls, the portion of said band, which contacts with said press-roll having a movement in a direction opposite to that portion of the press-roll which it engages.

3. In a Fourdrinier machine having in combination with the press-rolls and felts, a take-off device comprising a travelingband arranged above and in substantially parallel relation with the felts and extended over the space between them, end-rolls supporting said band, one of said end-rolls being bodily movable, and means to move said movable end-roll bodily to carry the band into and out of engagement with one of the press-rolls, the portion of said band which contacts with said press-roll having a travcling movement in a direction opposite to that portion of the press-roll which it engages.

4. In a Fourdrinier machine having in combination with the press-rolls and felts, a take-off device comprising a traveling-band, end-rolls supporting said band, one of said end-rolls being bodily movable, and means to move said movable end-roll bodily to carry the band into and out of engagement with one of the press-rolls, the portion of said band which contacts with said pressroll having a traveling movement in a direction opposite to that portion of the pressroll which it engages, and manual means connected with the movable end-roll for moving it. I

5. In a Fourdrinier machine having in combination with the press-rolls and felts, a take-off device comprising a traveling band, end-rolls supporting said band, one of said end-rolls being bodily movable, and means to move vsaid movable endaroll bodily to carry the band into and out of engagement .with one of the press-rolls, the portion of said band which contacts with said pressroll having a traveling movement m a direction opposite to that portion of the pressrollwhich it engages, and a pivoted lever connected with the movable end-roll for -moving it.

rolls and adapted for contact therewith, its contacting portion traveling in a direction opposite to the portion of the press-roll which it engages, said band being arranged nl substantially parallel relation with the 8. In a Fourdrinier machine having in combination with the press-rolls and felts, a take-ofi device comprising a traveling feltband arranged adjacent to one of the pressrolls and adapted for contact therewith, its contacting-portion traveling in a direction opposite to the portion of the press-roll which it engages, said band being arranged above and in substantially parallel relation with the felts and extended over "the space between two felts.

9. In a Fourdrinier machine having "in combination with the press-rolls and felts, a take-off device comprising a traveling feltband arranged adjacent to one of the pressrolls and adapted for contact therewith, its contacting-portiontraveling in a direction opposite to the portion of the press-roll which it engages, and supporting and traveling-m'eans for said band.

10. In a Fourdrinier machine having in combination with the press-rolls and felts,a

take-ofi device comprising a traveling feltbandarranged adjacent to one of the pressrolls and adapted for contact therewith, its contacting-portion traveling ina direction opposite to that portion of the press-roll which it engages, and traveling-means for said band, and means to move said band into a and out of engagement with the press-roll.

11. In a Fourdrinier machine in combination with the press-rolls and felts, a narrow felt-strip arranged on a rotatable cylindrical member adjacent one of the press-rolls and adapted for contact therewith, its contacting-portion traveling in a direction option withthe press-rolls and felts, a narrow felt-strip arranged on a rotatable cylindrical member adjacent one of the press-rolls and adapted for contact therewith, its contacting-portion being movable in a direction opposite. to that portion of the press-roll which 't engages. and means to move said member bodily to move the felt into and out of engagement with the press-roll.

13. In a Fourdrinier machine having in combination with the press-rolls and felt, a take-off device comprising a traveling-band arranged over the felt and adjacent one of the press-rolls, its traveling movement being at a reater speed than the speed of the moving elt, an end-portion of said band being movable into and out of engagement with one of the press-rolls, and its contact portion traveling in a direction opposite to that portion of the roll which it engages.

14. In a Fourdrinier machine having in combination with the press-rolls and felts, a take-off devicecomprising a traveling-band arranged over the adjacent portions of two felts and adjacent the upper press-roll, its traveling motion being at a greater speed than the speed of the felts, and its end-portion being movable into and out of engagement with said press-roll, and its contact portion traveling in a direction opposite to the portion of the press-roll which it en-' gages.

In testimony whereof, I have slgned my name to this specification, in the presence ofwitnesses. v

two subscribin C RLES ELMER POPE. Witnesses:

Jas. O. WEIR, Jr.,

W. C. JENKINS, Jr. 

